Aham — I amsarvasy — in entire/all
prabhavo —– that is kind of power, influence, and capacity I have! (Telugu — Prabhavam)

I believe, any person of faith will believe God is the origin for everything. I don’t believe this verse in a literal sense is saying “I am the origin of everything,” people of faith would already know this. I believe it is saying I am in the entire, that is the kind of influence and power I have. Nothing is this universe is without a cause and effect.

Where does this line in the verse come from? The verse is from chapter 10 (10. 8)

Aham sarvsya prabhavo mattah sarvam pravartate

iti matva bhajante mam budha bhava-samanvitah

Aham sarvsya prabhavo —- I am (aham) in the entire (sarvsya), that is the kind of power, influence and capability I have (prabhavo).

mattah sarvam pravartate –— Through religion (mattah), in all (sarvam), willingness to show observe actions/behaviors (pravartate; use it in Tel. also).

Full meaning — I am in the entire, that is the kind of power, influence and capability I have. Through religion, in all, will observe actions/behaviors. Thus knowing this honor through worship. Belonging to us is our intellect (knowing the difference between right from wrong). This shows/ expresses itself in a way to serve everyone equally accordingly.

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Here is what is in the text for your reference —

This translation does not do the Sanskrit justice at all. That is what has been used for every single Gita to write purports or further explanations.